It is the biggest game of Milner's career and he is keen to exact revenge and earn England a quarter-final meeting with Argentina or Mexico.
The Aston Villa player told FATV: "I would say it is the biggest game of my career. It is definitely up there.
"You are very lucky to be playing in a World Cup for your country.
"Each game is the biggest game. Now it's the knockout stages and Germany is a massive game at whatever level - from Under-16s right through to the full squad.
"There is a great occasion and history about the fixture.
"We played Germany in the European Championships and were unlucky in the final. Things didn't quite go for us, and we didn't perform as well as we could. They were a good team, organised, pretty good going forward.
"Germany scored a few goals on the break when we were going forward, but they moved the ball around well as you've seen in this tournament.
"It will be a tough game on Sunday but, for those of us involved in the Under-21s last year, it would be good to get one back on them and set the record straight."